A Cruise Report: SR01 A.1 Cruise Narrative A.1.1 Highlights
WOCE Line SR01
Expocode 20VDSR0194_1
Chief Scientist: Capit n de Corbeta Jorge Maturana Lavin.
Servicio Hidrogr fico y Oceanogr fico de la Armada (SHOA).
Err zuriz 232, Playa Ancha.
Valpara so, Chile.
Tel fono: 56-032-266666 Fax: 56-032-266542 Ship AGOR60- Vidal Gormaz.
Ports of call Punta Arenas, Chile
Cruise Dates November 08 — December 09 1994 A.1.2 Cruise Summary
Cruise Track
The cruise track and station locations are shown in figure 1.
Number of stations
A total of 18 hydrographic stations were performed using a CTD sealogger model 1064 (first three stations) and a CTD sealogger model 1240 (the remaining stations).
Sampling
continuos profiles of temperature and salinity were made using a CTD.
Floats, Drifters, and Moorings (None)
A.1.3 List of principal Investigators
NAME RESPONSABILITY INSTITUTION
CC. Sr. J. Maturana L Chief Scientist. SHOA
EaC. Sr. D. Gutierrez Chief of watch 1,computer operator. SHOA EaC. Srta. Y. Guerrero Chief of watch 2,computer operator. SHOA
A.1.4 Scientific Programme and methods
The principal objectives of the cruise were to collect necessary information to increase the scientific knowledge of the dynamic of the Antarctic Circumpolar Current at Drake Passage in order to contribute to international WOCE program.
Preliminary Results
A.1.5 Major Problems Encountered on the Cruise
• The Rosette sampler was lost due to a winch operation problem.
• Many problems with the XBT probes made unsuccessful launches.
• Iceberg drifting and ice debris in the area of study and also poor visibility made difficult conditions to accomplish the hydrographic stations.
A.1.6 Other Observations of Note
Due to the lost of the CTD 19 model 1064 the first three stations could not be corrected.
A.1.7 List Of Cruise Participants
NAME RESPONSABILITY INST.
CC. Sr. J. Maturana Chief Scientist SHOA
C1° (Met) J. Bravo Meteorologist SHOA
EaC. Sr. D. Gutierrez Chief of watch 1 SHOA
S2° Serv. (Oc) P. Urz a Winch operator and Rosette meneuver SHOA C1° Serv. (Oc) R. Montecinos Winch operator and Rosette meneuver SHOA
M° Serv. (Oc) D. Meza Oxygen an lisis SHOA
M° Serv. (Oc) C. Saavedra M. XBT launcher , salinity sampler. SHOA
EaC. Srta. Y. Guerrero A. Chief of watch 2 SHOA
S2° Serv. (Oc) A. Sanchez R Winch operator, XBT launcher SHOA
C1° Serv. (Db.C) J. Freire . Water sampler SHOA
M° Serv. (Oc) P. Altamirano F. Rosette manoeuvre , oxygen analysis SHOA M° Serv. (Oc) M. Higueras M. XBT launcher , salinity sampler. SHOA
A.2 Underway Measurements
A.2.1 Navigation (Not available) A.2.2 Echosounding
(Not available)
A.2.3 Acoustic Doppler Current Profiler (ADCP) (None)
A.2.4 Thermosalinograph Measurements:
(None) A.2.5 XBTs
A total of 18 XBT launches (T5 and T7) were performed.
A.2.6 Meteorological Measurements
Meteorological data measured were: wind speed and direction, air temp., atmospheric pressure.
A.3 Hydrographic Measurement Techniques and Calibration A.3.1 Sample Salinity Measurements
(Not sampled)
A.3.2 Sample Oxygen Measurements (Not sampled)
A.3.3 Nutrients (Not sampled) A.3.4 CFC
(Not sampled)
A.3.5 Samples taken for other chemical measurements (None)
A.3.6 CTD Measurements
The CTD used was a Sealogger-19 model 1240 bought by SHOA in 1992, whose first calibration was made in 1995.
A.3.7 CTD Data collection and processing Data registry:
Date STATION
11/ 19/1994 1, 2, 3, 4 11/ 20/1994 5,6,7,8,9
11/21/1994 10, 11, 12, 13, 14, 15, 16
11/22/1994 17, 18
CTD SBE-19 model 1240
It was bought by SHOA in 1992 and it first calibration was made in 1995.
Therefore, the calibration coefficients used were the ones from the 1992 with the slope and offset calculated from the lineal time drift.
Temperature:
A = 3.67439294E-03 Slope = 1 B = 5.79923710E-04 Offset = -0.0011 C = 8.23609887E-06
D = -1.55263735E-06 FO = 2408.120
Day B n b/n post-delta(t) offset 19 750 850 0.8823529 0.00129 -0.0011 20 751 850 0.8835294 0.00129 -0.0011 21 752 850 0.8847059 0.00129 -0.0011 22 753 850 0.8858824 0.00129 -0.0011 b: number of days between calibration and the day of CTD cast.
n: number of days between calibrations.
Post-delta (T): temperature-drift value according calibration certificate.
Conductivity:
M = 2.6 Offset = 0
A = 2.33127200E-03 slope1 = 0.999783 B = 4.91763158E-01 slope2 = 0.999782 C = -4.12966273E+00
D = 5.64959638E-04 E = -9.5700E-08
Day B n b/n (Pre-slope)-1 Slope 19 750 850 0.8823529 -0.000246 0.999783 20 751 850 0.8835294 -0.000246 0.999783 21 752 850 0.8847059 -0.000246 0.999782 22 753 850 0.8858824 -0.000246 0.999782
Therefore, two *.con configuration files were created (SR1-94 A.con and SR1-94 B.con)
Pressure
A0 = 4966.795
A1 = -1.301054E+00 A2 = 1.217797E-08 Processing
Step 1
1. Convert data from *.hex to *.cnv format using DATCNV program and *.con configuration file.
2. Deleting negatives velocities using the leewoce.bas program 3. Checking and cleaning the header files.
4. Computing the average down velocity value (X).
5. to apply the Aling CTD program to correct temperature and conductivity time response shift from the CTD sensors.
Step 2
a) To apply DATCNV program to average observed values meter by meter.
Step 3
a) To apply Winfilter program to filter data after step 2 , using a flexible windows determined by the user.
A.3.8 Satellite image acquisition and processing (None)
A.3.9 Shipboard computing (None)
Note:All data from WOCE PR14 and SR1 cruises, have been passed to the National Oceanographic Data Center of Chile (CENDOC) for data management purposes and to be quality controlled according to normal WHPO procedures. Once finished they have been sent to the WOCE Hydrographic Program Office at the Scripps Institution of Oceanography for archival. For major information write to:
Ricardo Rojas Chief of CENDOC
Casilla 324 Valparaiso
CHILE
e-mail rrojas@shoa.cl
who can direct your request to the appropriate decision channels. Do not write directly to Principal Investigators.
70ºW 65º 60º 55º
70ºW 65º 60º 55º
55º
60º S 1
2 3
4 5
6 7
8 9
1 0 1 1
1 2 1 3
14 1 5
16 1 7
1 8
P A
S O
D R
A K
E
ESTREC HOBRANSFIELD
CRUCERO SR-1 NOV-DIC 199 4
Figure 1. Position of stations during WOCE SR1 1994.
